@@ -257,6 +257,8 @@ tests := \
tst-mntent-blank-passno \
tst-mntent-escape \
tst-mntent2 \
+ tst-mremap1 \
+ tst-mremap2 \
tst-preadvwritev \
tst-preadvwritev2 \
tst-preadvwritev64 \
new file mode 100644
@@ -0,0 +1,46 @@
+/* Test mremap with MREMAP_MAYMOVE.
+ Copyright (C) 2024 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <sys/mman.h>
+#include <support/xstdlib.h>
+#include <support/xunistd.h>
+#include <support/check.h>
+#include <support/test-driver.h>
+
+static int
+do_test (void)
+{
+ size_t old_size = getpagesize ();
+ char *old_addr = xmmap (NULL, old_size, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1);
+ old_addr[0] = 1;
+ old_addr[old_size - 1] = 2;
+
+ /* Test MREMAP_MAYMOVE. */
+ size_t new_size = old_size + old_size;
+ char *new_addr = mremap (old_addr, old_size, new_size, MREMAP_MAYMOVE);
+ TEST_VERIFY_EXIT (new_addr != MAP_FAILED);
+ new_addr[0] = 1;
+ new_addr[new_size - 1] = 2;
+ xmunmap (new_addr, new_size);
+
+ return 0;
+}
+
+#include <support/test-driver.c>
new file mode 100644
@@ -0,0 +1,53 @@
+/* Test mremap with MREMAP_FIXED.
+ Copyright (C) 2024 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <sys/mman.h>
+#include <support/xstdlib.h>
+#include <support/xunistd.h>
+#include <support/test-driver.h>
+
+static int
+do_test (void)
+{
+ size_t old_size = getpagesize ();
+ size_t new_size = old_size + old_size;
+ char *old_addr = xmmap (NULL, old_size, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1);
+ old_addr[0] = 1;
+ old_addr[old_size - 1] = 2;
+
+ char *fixed_addr = xmmap (NULL, new_size, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1);
+ fixed_addr[0] = 1;
+ fixed_addr[new_size - 1] = 2;
+
+ /* Test MREMAP_FIXED. */
+ char *new_addr = mremap (old_addr, old_size, new_size,
+ MREMAP_FIXED | MREMAP_MAYMOVE,
+ fixed_addr);
+ if (new_addr == MAP_FAILED)
+ return errno == EINVAL ? EXIT_UNSUPPORTED : EXIT_FAILURE;
+ new_addr[0] = 1;
+ new_addr[new_size - 1] = 2;
+ xmunmap (new_addr, new_size);
+
+ return 0;
+}
+
+#include <support/test-driver.c>
@@ -206,6 +206,7 @@ tests += \
tst-getauxval \
tst-gettid \
tst-gettid-kill \
+ tst-linux-mremap1 \
tst-memfd_create \
tst-misalign-clone \
tst-mlock2 \
new file mode 100644
@@ -0,0 +1,62 @@
+/* Test mremap with MREMAP_DONTUNMAP.
+ Copyright (C) 2024 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <sys/mman.h>
+#include <support/xstdlib.h>
+#include <support/xunistd.h>
+#include <support/check.h>
+#include <support/test-driver.h>
+
+static int
+do_test (void)
+{
+ size_t old_size = getpagesize ();
+ size_t new_size = old_size;
+ char *old_addr = xmmap (NULL, old_size, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1);
+ old_addr[0] = 1;
+ old_addr[old_size - 1] = 2;
+
+ /* Create an available 64-page mmap region. */
+ size_t fixed_size = old_size * 64;
+ char *fixed_addr = xmmap (NULL, fixed_size, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1);
+ xmunmap (fixed_addr, fixed_size);
+
+ /* Add 3 * pagesize. */
+ fixed_size += 3 * old_size;
+
+ /* Test MREMAP_DONTUNMAP. It should return FIXED_ADDR created above. */
+ char *new_addr = mremap (old_addr, old_size, new_size,
+ MREMAP_DONTUNMAP | MREMAP_MAYMOVE,
+ fixed_addr);
+ if (new_addr == MAP_FAILED)
+ return errno == EINVAL ? EXIT_UNSUPPORTED : EXIT_FAILURE;
+ TEST_VERIFY_EXIT (fixed_addr == new_addr);
+ old_addr[0] = 3;
+ old_addr[old_size - 1] = 4;
+ new_addr[0] = 1;
+ new_addr[new_size - 1] = 2;
+ xmunmap (new_addr, new_size);
+ xmunmap (old_addr, old_size);
+
+ return 0;
+}
+
+#include <support/test-driver.c>
Add tests for MREMAP_MAYMOVE and MREMAP_FIXED. On Linux, also test MREMAP_DONTUNMAP. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> --- misc/Makefile | 2 + misc/tst-mremap1.c | 46 +++++++++++++++ misc/tst-mremap2.c | 53 ++++++++++++++++++ sysdeps/unix/sysv/linux/Makefile | 1 + sysdeps/unix/sysv/linux/tst-linux-mremap1.c | 62 +++++++++++++++++++++ 5 files changed, 164 insertions(+) create mode 100644 misc/tst-mremap1.c create mode 100644 misc/tst-mremap2.c create mode 100644 sysdeps/unix/sysv/linux/tst-linux-mremap1.c